Air pump



FIG. 1 is a perspective view of an air pump showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is an enlarged detailed view according to Area 8 circumscribed within FIG. 2.

The evenly-spaced broken lines shown are included for the purpose of illustrating unclaimed subject matter and forms no part of the claimed design. The dash-dot-dot-dash broken lines on FIGS. 2 and 8 represent the unclaimed boundary and forms no part of the claimed design. 

CLAIM The ornamental design for an air pump, as shown and described. 